diff --git a/src/nzg_bufferInit.c b/src/nzg_bufferInit.c
new file mode 100644
index 0000000..17f1661
--- /dev/null
+++ b/src/nzg_bufferInit.c
@@ -0,0 +1,36 @@
+#include "libnazgul.h"
+
+int msgBufferInit(msgPoolData * poolDataTabAddr,int poolIndex){
+  msgBufferInfoTabId bufferInfoTabId;
+int bufferInfoTabFd;
+msgBufferInfo * bufferInfoTabAddr;
+int bufferInfoNb;  
+int bufferFreeIndex;
+
+  //récuperer l'ID du BufferInfoTab;
+  strcpy(bufferInfoTabId, poolDataTabAddr[poolIndex].bufferInfoTabId);
+  
+  bufferInfoTabFd=shm_open(bufferInfoTabId,O_RDWR,SHM_DEFAULT_MODE);
+  if (bufferInfoTabFd<0){
+	perror("shm_open");
+	return -1;
+  }
+
+  /** on regarde dans le tableau d'infos de buffer **/
+  bufferInfoNb=poolDataTabAddr[poolIndex].bufferNb;
+  bufferInfoTabAddr=mmap(NULL,bufferInfoNb*sizeof(msgBufferInfo),
+	  PROT_READ,MAP_SHARED,bufferInfoTabFd,(off_t)0);
+
+  int i=0;
+  while ((i<bufferInfoNb) 
+	  && (bufferInfoTabAddr[i].ownerPid != (pid_t)-1)){ i++; }
+  if (i == bufferInfoNb){ return -1; }
+  bufferFreeIndex=i;
+  
+  if (munmap(bufferInfoTabAddr,bufferInfoNb*sizeof(msgBufferInfo))< 0)
+  {	perror("munmap"); return -1; }
+
+  
+ return -1; 
+}
+
diff --git a/src/nzg_iface.h b/src/nzg_iface.h
index 1fd07df..9304285 100644
--- a/src/nzg_iface.h
+++ b/src/nzg_iface.h
@@ -13,6 +13,8 @@ typedef char msgSpaceListElemId[4*MSGSPACE_ID_LEN];
 typedef char msgPoolDataTabId[4*MSGSPACE_ID_LEN];
 typedef char msgPoolDataTabSemId[4*MSGSPACE_ID_LEN];
 
+typedef char msgBufferInfoTabId[4*MSGSPACE_ID_LEN];
+
 typedef char msgPoolId[4*MSGSPACE_ID_LEN];
 typedef char msgPoolSemId[4*MSGSPACE_ID_LEN];
 
@@ -26,12 +28,17 @@ typedef struct MsgPool {
   int bufferNb;
 } msgPool;
 
+typedef struct MsgBufferInfo {
+  pid_t ownerPid;
+  void * addr;
+} msgBufferInfo;
+
 typedef struct MsgPoolData {
   msgPoolId id;
+  msgBufferInfoTabId bufferInfoTabId;
   int bufferNb;
   int bufferSize;
   int allocDispBuffer;
-  sem_t * allocOverload;
 } msgPoolData;
 
 /* TODO: queueId */
diff --git a/src/nzg_proto.h b/src/nzg_proto.h
index 78a25b0..b27daed 100644
--- a/src/nzg_proto.h
+++ b/src/nzg_proto.h
@@ -12,7 +12,9 @@ int msgPoolCreate(msgSpaceId spaceId, int poolIdx, int buffNb, int buffSize);
 msgSpace *msgSpaceCreate(msgSpaceId spaceId, int queueNb, int poolNb, msgPool *poolInfos);
 msgSpace *msgSpaceOpen(msgSpaceId spaceId);
 int msgSpaceDelete(msgSpaceId spaceId);
-/* src/nzg_state.c */
+/* src/nzg_buffer.c */
+int msgBufferGetFreeIndex(msgPoolData * poolDataTab, int poolIndex);
+int msgBufferAttachProc(msgPoolData * poolDataTab, int poolIndex, void *addr);
 
 
 #endif